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Finding the Fourth Proportional to 8,429.76, 11,631.84 and 4,893.12

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Solution

The fourth proportional to 8,429.76, 11,631.84 and 4,893.12 is: 6,751.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,429.76 : 11,631.84 = 4,893.12 : x
  2. Step 2: Convert to fraction form
    8,429.76/11,631.84 = 4,893.12/x
  3. Step 3: Cross multiply
    8,429.76x = 11,631.84 × 4,893.12
  4. Step 4: Simplify right side
    8,429.76x = 56,915,988.94
  5. Step 5: Solve for x
    x = 56,915,988.94/8,429.76
  6. Step 6: Final answer
    x = 6,751.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.